there are some spray glues made specifically for rubber type components...use that one...i think its either 90 or 98....i forget the number on the can...and its only a few dollars for the can
as for the use in your car...i wish i had known this when i did it...i grabbed this from
http://www.sounddeadenershowdown.com/ which i found here on the forum maybe an hour ago...
here goes:
SBR(styrene-butadiene-rubber)/Asphalt
This is the least expensive material to use. It is predominantly asphalt with a latex polymer, the SBR part, added for stability. Asphalt has one virtue. It is cheap. They make roads out of it. Unfortunately, it has several negative features that limit its usefulness for our purposes. It melts at a relatively low temperature. It becomes brittle at a relatively high temperature. Both states are bad for us. Optimum viscoelasticity requires that the material not be liquid or solid. Basic mass loading requires that the material adhere to the surface we want it to. If it melts, it will fall off vertical or inverted surfaces. If it becomes brittle, it is susceptible to detaching under normal vibrations.
The rubber compound is added to the asphalt to stabilize it. SBR/asphalt melts at a higher temperature and becomes brittle at a lower temperature than plain or "neat" asphalt. This doesn't completely solve the problem. SBR is subject to long term deterioration at temperatures that are possible in a car.
When I started this investigation, one of my primary objectives was to figure out why so many people seemed to have trouble with their mat falling off. If you search the Web for sound deadener falling off, you will see lots of cases of asphalt mats failing and no failures that I have been able to find involving butyl based mats. It just isn't possible that user error would be so neatly divided.
I looked at the specifications for products developed for roofing, which many of the products in this category began life as, I saw the problem. Roofing materials are designed to withstand temperatures of 158°F for two weeks without melting. Manufacturers supply butyl products for situations that will either exceed this temperature or duration. Extend the time and the maximum sustainable temperature falls. This explains why some people have had success with asphalt mats for a few years, only to have them fail in a subsequent year. Failure can be disastrous. If you're lucky, the mat will just fall off. If you're not, it will melt - pools of asphalt in your carpet or upholstery or window mechanism.
Another problem with asphalt mats is the smell. You should be fine during cool weather, but on a hot day, they tend to smell like, well asphalt.
Peel & Seal and Jiffy Seal are roofing products that fit in this category. Many people buy them for sound deadening. Of the products I tested, B-Quiet Extreme, Brown Bread, Dynamat Original, eDead v1, eDead v1SE and FatMat are in this group. Many people report great success with one or more of these mats. They are certainly the cheapest option. If you know your car will never be exposed to extreme heat or cold, they may work for you. I'm not suggesting that all of these products have a 100% failure rate under extreme conditions, but I do believe they are risky. Their narrower temperature range also means they will be less effective the farther they get from room temperature. I would not use any of these products in my car.
Butyl with Asphalt filler
I tested two products in this category - B-Quiet Ultimate and RAAMmat BXT. The adhesive layer is butyl for greater temperature resistance and odor control than the SBR/Asphalt mats. Asphalt is added to the butyl to add mass because it is inexpensive. This reduces the beneficial aspects of butyl to some extent, but they are demonstrably superior to the SBR/Asphalt products. They melt at a substantially higher temperature and stay flexible to a lower temperature.
The asphalt content makes these mats less expensive than the products in the next category. If you want to save money and still get a product that will be reliable, this is the category to pick. Please don't confuse products in this category with the asphalt mats described above. If there were only two categories, these mats would be grouped with the next. They have none of the problems associated with the SBR/Asphalt mats. The asphalt is suspended in a nearly inert state and only serves to add mass and control costs.
Butyl with a non-asphalt filler.
Products in this category match a butyl base with a non-asphalt filler to add mass. The mats I tested have a higher butyl content than the butyl with asphalt mats and are therefore more expensive. Second Skin Damplifier, Damplifier Pro and Dynamat Xtreme fall into this group. I'm also looking forward to samples being sent by Cascade that have similar properties.
These are the elite sound deadeners. They have the heaviest aluminum foil constraining layers and are the most expensive to manufacture. They have heat tolerances significantly higher than any of the other products I tested, with the Second Skin products having the highest tolerance of all. If your mat is going to be exposed to extreme conditions or if you are willing to pay more to squeeze that last bit of performance out of your efforts, these are the mats for you.